Reservoir 4606-1 Construction (Mission Hills Pressure Zone)
STI/SPFA 2017 Tank of the Year
| Product / project title: | Reservoir 4606-1 Construction (Mission Hills Pressure Zone) |
| Product / project owner: | Coachella Valley Water District |
| Product / project location: | Coachella Valley, CA |
| Date completed: | Nov 2017 |
| Construction standard (if any): | AWWA D100 |
| Overall height / length (feet, inches): | 40’ -0” |
| Column height (feet, inches): | – |
| Diameter (feet, inches): | 186’ – 0” |
| Capacity (US gallons): | 6,800,000 |
| Steel tonnage used (US tons): | 619 |
| Steel thickness (inches): | 0.3125” to 0.9788” |
| PRODUCT/PROJECT DESCRIPTION AND SPECIAL FEATURES: | |
| This tank was under consideration to be built via concrete or welded but the design team performed a Life cycle cost analysis and overall bid the job as a welded steel tank. It was designed to meet the new demands of an ever growing city as well as supplement future demand of additional housing tracks. This asset will be a critical part of their system for decades/ centuries to come. The tank was designed in accordance with AWWA D-100 section 14 in order to be as cost effective as possible; but due to high seismic load’s and the tank being located just feet away from the San Andres Fault line there were many precautions taken in the design/supply of the reservoir. The tank as a whole weighed more than 1.2 million pounds and was constructed during the Santa Ana winds. The effects of the high winds were amplified by the fact that it’s located on a mountain range which regularly sees winds in excess of 60 mph on any given day. Although there were many days which the crew had to work split shifts or submit a weather delay, we were still able to complete the job on time with a satisfied customer and a safe crew. This was due to the construction sequencing of a welded steel tank and the ability to start / stop as needed in order for the crew to safely follow all applicable safety regulations. |
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